Fire insurance--Pennsylvania--Ambler--Maps ; Fire insurance--Pennsylvania--Fort Washington--Maps ; Ambler (Pa.)--Maps ; Fort Washington (Pa.)--Maps
Publisher's title from [sheet 1]. Copyright 1922 by the Sanborn Map Co."" ""Dec. 1921."" Oriented with the north to the right on some sheets. Includes location map, key, sheet index map, street and special index, and text.""
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